Home / 19,728.19-27,206.87-15,421.85

Finding the Fourth Proportional to 19,728.19, 27,206.87 and 15,421.85

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Solution

The fourth proportional to 19,728.19, 27,206.87 and 15,421.85 is: 21,268.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,728.19 : 27,206.87 = 15,421.85 : x
  2. Step 2: Convert to fraction form
    19,728.19/27,206.87 = 15,421.85/x
  3. Step 3: Cross multiply
    19,728.19x = 27,206.87 × 15,421.85
  4. Step 4: Simplify right side
    19,728.19x = 419,580,320.26
  5. Step 5: Solve for x
    x = 419,580,320.26/19,728.19
  6. Step 6: Final answer
    x = 21,268.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.